docs: def openEmbedded(self, name):
          """Open a CArchive of name NAME embedded within this CArchive."""
          ndx = self.toc.find(name)
          if ndx == -1:
              raise KeyError, "Member '%s' not found in %s" % (name, self.path)
          (dpos, dlen, ulen, flag, typcd, nm) = self.toc.get(ndx)
          if flag:
              raise ValueError, "Cannot open compressed archive %s in place"
          return CArchive(self.path, self.pkgstart+dpos, dlen)